20400400102412 has 48 divisors (see below), whose sum is σ = 43407549924480. Its totient is φ = 8268104736000.

The previous prime is 20400400102409. The next prime is 20400400102417. The reversal of 20400400102412 is 21420100400402.

It is not an unprimeable number, because it can be changed into a prime (20400400102417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717703214 + ... + 717731637.

It is an arithmetic number, because the mean of its divisors is an integer number (904323956760).

Almost surely, 2^{20400400102412} is an apocalyptic number.

20400400102412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20400400102412 is an abundant number, since it is smaller than the sum of its proper divisors (23007149822068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20400400102412 is a wasteful number, since it uses less digits than its factorization.

20400400102412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435434902 (or 1435434900 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20400400102412 its reverse (21420100400402), we get a palindrome (41820500502814).

The spelling of 20400400102412 in words is "twenty trillion, four hundred billion, four hundred million, one hundred two thousand, four hundred twelve".